Duplicant can suffocate to death if assigned to neural vacillator for long time

Yes, the problem is with "step 2" I am afraid

It's not a bug in itself, but I do get what you mean. It would be great if you did not have to "confirm" when you assign a dupe to the chair, that it just did its thing and zapped the dupe instead of locking them in place for further input from the player.

Edited December 11, 2021 by NeoDeusMachina

as a workaround, you can use this mod.

This can probably also happen in teleporters.